OFFSET
1,1
COMMENTS
Row 5 of A199530.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = (115/12)*n^4 + (115/6)*n^3 + (41/12)*n^2 - (1/6)*n.
Conjectures from Colin Barker, May 15 2018: (Start)
G.f.: 2*x*(16 + 80*x + 22*x^2 - 3*x^3) / (1 - x)^5.
a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5) for n>5.
(End)
EXAMPLE
Some solutions for n=5:
..2....1....3...-5....1....0....5....5...-3....4...-5....1...-5...-2....0...-1
.-5...-2....4....4....4...-1...-3....0...-1...-3....1....0....3....3....1....5
.-4...-2...-4....1....3....1...-3...-2....2...-5....2...-5...-2...-3...-3....3
..3....4...-1...-2...-5....3...-1...-1...-3...-1....2....4...-1...-2...-3...-3
..4...-1...-2....2...-3...-3....2...-2....5....5....0....0....5....4....5...-4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 07 2011
STATUS
approved